AMONG the boldface names who attended the Core Club launch of Jessica Seinfeld‘s new cookbook, “Deceptively Delicious,” was her devoted husband, Jerry. “I’m not going to be like those Oscar speeches we hate,” the author said. “You are not my best friend! You are not my rock,” she joked, cracking up guests of Rupert and Wendi Murdoch, including Ellen Barkin, Arianna Huffington, Kelly Ripa and Ivanka Trump. Later, when asked if Jerry was ever any help in the kitchen, Jessica responded, “Does Jerry cook? No. I cook, they eat.”